Unfortunately, as far as I can see that's about all we can do. But that only removes one (almost certainly needed and essential) mimetype to give me a new one. I think. I've never tried it.

I did take a Cap'n Cook through the various "mtype" and "mimeType" files, but that's going into hairy places... It would be better to have an "Add" button somewhere...

I also looked around briefly for plugins, but no luck. Having said that, I personally don't believe plugins are necessarily the only way to go. Opera does give an "Add" button, but I don't know if that delves into Presto or simply edits a config file.

QuoteFileTypesMan is an alternative to the 'File Types' tab in the 'Folder Options' of Windows. It displays the list of all file extensions and types registered on your computer. For each file type, the following information is displayed: Type Name, Description, MIME Type, Perceived Type, Flags, Browser Flags, and more.
FileTypesMan also allows you to easily edit the properties and flags of each file type, as well as it allows you to add, edit, and remove actions in a file type.

By default, Km 1.6 and 1.7 have an empty mimetype.rdf file. There is no way to add something, as it's an old way which is probably to be abandonned.

But, if you copy a 1.54 mimetype file in Km profile folder, the entries already in are avalaible, and ought to work (not sure).

If you had used 1.5.x, you can try it, else I send here the one I used with 1.5.4.
You'll have then to remove entries which aren't ok for you, or modify it. Another solution is to use 1.5.4 to add your extensions and put it then in your last version profile folder.

Warning, the structure is a bit hard to understand. I have had problems there is a few years when I have worked on it.

PS: This version was made to be used under Linux, and a lot of entries aren't needed with Windows.
A+

I still have 1.5.4 as a backup, sort of, so create the Excel entries there, open the mimeTypes.rdf in PSPad -- Unix line endings, UTF-8 -- select and copy to mimeTypes.rdf in my 1.6.0 profile, same settings.

@guenter - I've downloaded rvjmimeedit.7z, and will suss it out.

Why do we need to discontinue the 1.5.4 method of adding mimetypes/internet content associations? It doesn't look broken

Why do we need to discontinue the 1.5.4 method of adding mimetypes/internet content associations? It doesn't look broken

1.) Hope all works.

2.) 1.5.4 has two MimeTypes editors. An ancient one that was created & maintained by alain, kko and me. It edited & used mimetypes.rtf, was hard to use and could add new items.

And another, never editor by kko. It is in the PreferencesPanel, has a pre-definded list thus could not add new mimetypes but is easy to use.

kko and me realized that hardly anyone used the first. So we agreed in an old forum thread to discontinue adding it to K-Meleon by default. When 1.6beta came I realized that it also was broken beyond my ability to repair. disrupted pointed me to a fork based on the same original code which works for K-Meleon 1.6. So I merged the codes for the few that want to use the old editor and uploaded it to my K-Meleon site.

QuoteguenterIt edited & used mimetypes.rtf, was hard to use and could add new items.

I'm not surprised few people used it. Most don't need to as most times the default set is sufficient, and they probably don't really know what a mime-type is. And of course, if you don't know what a mime-type is, how are you going to use the editor?

(To be honest, I don't think KM actually needs a built-in mime editor. Not many people need it, and when they do it is better to download an extension -- like rvjmimeedit! It has to do with "The Browser, the whole Browser and nothing but the Browser", which KM fulfils admirably.)

@JujuLand - the structure is a bit scary, but once I saw the real thing in 1.5.4 it became clear: like SGML with opening and closing tags, elements and attributes. I don't yet grasp the sordid details entirely -- can't be bothered -- but the schema is now clear!